At the center of the Houston Astros' offseason is the fact that they will have to find a way to replace Framber Valdez. It's not the strongest free agent class for starting pitchers, with Valdez, Dylan Cease, Michael King, and Ranger Suarez all at the top of the market. Each is a strong option and could easily slot at the top of any rotation, but has varying degrees of red flags that create some risk.
For a team like the Astros, the risk is magnified by the fact that they don't really have the room to offer up a lucrative long-term deal for a starting pitcher.